The curve
in the ruled surface parameterization
is called the directrix (or base curve).
See also
Director Curve,
Ruled
Surface
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References
Gray, A. Modern Differential Geometry of Curves and Surfaces with Mathematica, 2nd ed. Boca
Raton, FL: CRC Press, p. 431, 1997.Referenced on Wolfram|Alpha
Ruled Surface Directrix
Cite this as:
Weisstein, Eric W. "Ruled Surface Directrix."
From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/RuledSurfaceDirectrix.html
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